#include <stdio.h>

int main(int argc,char *argv[])
{
	//第一种情况
	/*int x = 100;
	printf("x = %d\n",x);*/
	
	//第二种情况
	int x;
	printf("x = %d\n",x);
	x = 100;
	printf("x = %d\n",x);
	
	return 0;
}